Nematic phase in the J${}_1$-J${}_2$ square lattice Ising model in an external field

Alejandra I. Guerrero, Daniel A. Stariolo, Noé G. Almarza

The J${}_1$-J${}_2$ Ising model in the square lattice in the presence of an external field is studied by two approaches: the Cluster Variation Method (CVM) and Monte Carlo simulations.…